'Look, I think everybody should be married,' she told The Sunday Times.

'It’s something which creates strength in our society and whether it is two men, two women or a man and a woman, it is something which is a way for us to strengthen our society further.'

In May, Miller did urge Cameron not to drop his support for same-sex marriage after right-wing Conservatives urged him to ditch the measure.

Miller, who previously worked as the minister for the disabled, has announced plans to fast-track the rollout of superfast broadband, which she said was particularly important in tackling rural unemployment.